Spray head temperature alarm circuit triggered based on CLK clock signal

Abstract

The utility model discloses a shower nozzle temperature alarm circuit based on CLK clock signal triggering, which comprises a shower nozzle, a triode switch, an IC1555YMS clock oscillator, an AND gate switch and a CPU master controller, the shower nozzle temperature alarm circuit based on the CLK clock signal effectively solves the problem of false triggering caused by electromagnetic interference of a traditional printer board card, and the shower nozzle temperature alarm circuit based on the CLK clock signal triggering effectively solves the problem of false triggering caused by the electromagnetic interference of the traditional printer board card. An XHOT temperature alarm signal of the spray head is connected to the triode switch through a resistor and capacitor network, the switch-on and switch-off of the switch are controlled by a stable clock signal generated by the IC1555YMS clock oscillator, it is ensured that only when the clock signal and the temperature alarm signal meet the conditions at the same time, the AND gate switch outputs a signal to the CPU master controller, and the temperature alarm signal is output to the CPU master controller. According to the method, the influence of external interference on an alarm system is reduced, the accuracy and stability of spray head temperature alarm are improved, and particularly in a large printer, the problem of electromagnetic interference caused by a long-distance spray head cable and multiple peripheral power devices is reduced.

Description

Technical Field

[0001] The utility model relates to the field of printers, in particular to a nozzle temperature alarm circuit triggered by a CLK clock signal. Background Art

[0002] In existing printer board designs, the nozzle temperature alarm system usually relies on a control IO interface to receive temperature feedback signals. However, this design has defects in large printers because the long-distance nozzle cables and numerous peripheral power devices are prone to electromagnetic interference, which may cause false triggering of temperature alarms. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the present invention provides a nozzle temperature alarm circuit triggered by a CLK clock signal.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] The utility model discloses a nozzle temperature alarm circuit based on CLK clock signal triggering, which includes a nozzle, a transistor switch, an IC1555YMS clock oscillator, an AND gate switch and a CPU main control.

[0006] The nozzle is used to accurately spray ink onto paper to form a printed pattern;

[0007] The transistor switch acts as a trigger for the temperature alarm signal to control the on and off of the alarm circuit;

[0008] The IC1555YMS clock oscillator is used to generate a stable clock signal to synchronize and control the timing of the entire inkjet system;

[0009] The AND gate switch is used for logically judging the temperature alarm signal and the clock signal;

[0010] The CPU master is used to receive signals from the AND gate switch and execute control commands.

[0011] Furthermore, the nozzle includes an XHOT nozzle temperature alarm signal, and the XHOT nozzle temperature alarm signal is respectively connected to one end of the first resistor R4 and the second resistor R5, the other end of the first resistor R4 is respectively connected to the power supply 3.3V and one end of the first capacitor C15, and the other end of the second resistor R5 is connected to the transistor switch.

[0012] Furthermore, the transistor switch includes a transistor Q1, the base of the transistor Q1 is connected to the XHOT nozzle temperature alarm signal through R5, the emitter of the transistor Q1 is connected to the power supply 3.3V and the second capacitor C1, the collector is connected to the power supply end of U2, the second capacitor C1 is also connected to the ground, and the collector of the second capacitor C1 is connected to the IC1555YMS clock oscillator.

[0013] Furthermore, the IC1555YMS clock oscillator includes a chip U2, a first pin of the chip U2 being respectively connected to the collector of the transistor switch and one end of the third capacitor C3, one end of the third capacitor C3 being also connected to one end of the fourth capacitor C14, the other ends of the third capacitor C3 and the fourth capacitor being both connected to the ground, a second pin of the chip U2 being connected to the other end of the third capacitor C3, a third pin of the chip U2 being respectively connected to one end of the third resistor R2 and the fourth resistor R3, one end of the fourth resistor R3 being also connected to one end of the fifth capacitor C17, the other ends of the fourth resistor R3 and the fifth capacitor C17 being also connected to the ground, and one end of the fifth capacitor C17 being also connected to the AND gate switch.

[0014] Furthermore, the fourth pin of the chip U2 is connected to the other end of the third resistor R2 and one end of the sixth capacitor C12 respectively, the other end of the sixth capacitor C12 is connected to the ground, and the fifth pin of the chip U2 is connected to the fourth pin of the chip U2.

[0015] Furthermore, the AND gate switch includes a chip U4, a first pin of the chip U4 is connected to the fifth pin of the chip U4 through a fifth resistor R6, the fifth pin of the chip U4 is also connected to one end of the first capacitor C15, the other end of the first capacitor C15 is connected to the ground, the second pin of the chip U4 is connected to the IC1555YMS clock oscillator, the third pin of the chip U4 is connected to the ground, and the fourth pin of the chip U4 is connected to the AD detection input end. Beneficial effects

[0016] The utility model effectively solves the problem of false triggering of traditional printer boards due to electromagnetic interference by introducing a nozzle temperature alarm circuit design based on the CLK clock signal. The XHOT temperature alarm signal of the nozzle is connected to the transistor switch through a resistor and capacitor network. The on and off of the switch is controlled by the stable clock signal generated by the IC1555YMS clock oscillator, ensuring that only when the clock signal and the temperature alarm signal meet the conditions at the same time, the AND gate switch will output a signal to the CPU main control, thereby executing the corresponding control command. This method reduces the impact of external interference on the alarm system, improves the accuracy and stability of the nozzle temperature alarm, and reduces the electromagnetic interference problem caused by long-distance nozzle cables and multiple peripheral power devices in large printers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the circuit framework of the utility model;

[0018] Figure 2 It is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 2 As shown in FIG. 1 , the present invention is a nozzle temperature alarm circuit based on CLK clock signal triggering, including a nozzle, a transistor switch, an IC1555YMS clock oscillator, an AND gate switch and a CPU main control.

[0020] The nozzle is used to accurately spray ink onto paper to form a printed pattern;

[0021] The transistor switch acts as a trigger for the temperature alarm signal to control the on and off of the alarm circuit;

[0022] The IC1555YMS clock oscillator is used to generate a stable clock signal to synchronize and control the timing of the entire inkjet system;

[0023] The AND gate switch is used to logically judge the temperature alarm signal and the clock signal to ensure that the alarm signal is sent to the CPU only under specific conditions.

[0024] The CPU main control is used to receive signals from the AND gate switch and execute corresponding control commands, such as adjusting the temperature or stopping printing.

[0025] Furthermore, the nozzle includes an XHOT nozzle temperature alarm signal, and the XHOT nozzle temperature alarm signal is respectively connected to one end of the first resistor R4 and the second resistor R5, the other end of the first resistor R4 is respectively connected to the power supply 3.3V and one end of the first capacitor C15, and the other end of the second resistor R5 is connected to the transistor switch.

[0026] Furthermore, the transistor switch includes a transistor Q1, the base of the transistor Q1 is connected to the XHOT nozzle temperature alarm signal through R5, the emitter of the transistor Q1 is connected to the power supply 3.3V and the second capacitor C1, the collector is connected to the power supply end of U2, the second capacitor C1 is also connected to the ground, and the collector of the second capacitor C1 is connected to the IC1555YMS clock oscillator.

[0027] Furthermore, the IC1555YMS clock oscillator includes a chip U2, a first pin of the chip U2 being respectively connected to the collector of the transistor switch and one end of the third capacitor C3, one end of the third capacitor C3 being also connected to one end of the fourth capacitor C14, the other ends of the third capacitor C3 and the fourth capacitor being both connected to the ground, a second pin of the chip U2 being connected to the other end of the third capacitor C3, a third pin of the chip U2 being respectively connected to one end of the third resistor R2 and the fourth resistor R3, one end of the fourth resistor R3 being also connected to one end of the fifth capacitor C17, the other ends of the fourth resistor R3 and the fifth capacitor C17 being also connected to the ground, and one end of the fifth capacitor C17 being also connected to the AND gate switch.

[0028] Furthermore, the fourth pin of the chip U2 is connected to the other end of the third resistor R2 and one end of the sixth capacitor C12 respectively, the other end of the sixth capacitor C12 is connected to the ground, and the fifth pin of the chip U2 is connected to the fourth pin of the chip U2.

[0029] Furthermore, the AND gate switch includes a chip U4, a first pin of the chip U4 is connected to the fifth pin of the chip U4 through a fifth resistor R6, the fifth pin of the chip U4 is also connected to one end of the first capacitor C15, the other end of the first capacitor C15 is connected to the ground, the second pin of the chip U4 is connected to the IC1555YMS clock oscillator, the third pin of the chip U4 is connected to the ground, and the fourth pin of the chip U4 is connected to the AD detection input end.

[0030] Specifically, the power supply 3.3V is the logic power supply; the second capacitor C1 is the power supply 3.3V filter capacitor, the first capacitor C15 is the power supply filter capacitor of the chip U4; the first resistor R4 is the pull-up resistor of the signal XHOT; the transistor Q1 is a PNP transistor, under normal working conditions, XHOT is a high level "1", and when the nozzle temperature is too high, it will output a low level "0"; the second resistor R5 is the base resistor of the transistor Q1, which is used to limit the current of the base circuit; the chip U2 is the clock oscillator chip, when the VS power supply is turned on At this time, the third pin of chip U2 will output a CLK signal 8KHZ pulse; the third capacitor C3 and the fourth capacitor C14 are filter capacitors for the collector output signal of transistor Q1, and are also filter capacitors for the power supply VS of chip U2; the fourth resistor R3 is a pull-down resistor for the CLK output signal, which ensures that the level is "0" under normal circumstances; the fifth capacitor C17 is a decoupling capacitor for the CLK signal to prevent false triggering due to external interference; chip U4 is an AND gate circuit, which outputs the signal TO_AD to the main control chip;

[0031] The third resistor R2 and the sixth capacitor C12 form an RC oscillation circuit to ensure that the chip U2 can output an 8KHZ CLK signal during normal operation;

[0032] Working principle:

[0033] Under normal working conditions, the XHOT signal output is high level "1". At this time, the transistor Q1 cannot be turned on, the chip U2 does not work normally, and the output signal TO_AD of the chip U4 is low level "0".

[0034] When the nozzle detection system detects that the temperature is too high, XHOT will output a low level "0". At this time, the transistor Q1 is normally turned on, and the collector output VS is about 3.3V. At this time, U2 will be powered normally and enter the normal working state. The OUT pin will output an 8KHZ CLK pulse signal; at this time, the AND gate IC of the chip U4 will also trigger the output signal TO_AD to have a CLK clock pulse output according to the CLK signal; the CPU main control will trigger the function operation according to the received 8Khz pulse signal;

[0035] When the machine occasionally receives a low-level "0" alarm trigger signal during operation, this situation is external interference. Only when it receives an 8KHZ CLK pulse signal will the alarm mechanism be activated. At this time, the interference false triggering situation can be completely eliminated.

[0036] This utility model effectively solves the problem of false triggering caused by electromagnetic interference in traditional printer boards by introducing a nozzle temperature alarm circuit design based on the CLK clock signal. In this design, the XHOT temperature alarm signal of the nozzle is connected to the transistor switch through a resistor and capacitor network. The on and off of the switch is controlled by the stable clock signal generated by the IC1555YMS clock oscillator. This design ensures that only when the clock signal and the temperature alarm signal meet the conditions at the same time, the AND gate switch will output a signal to the CPU main control, thereby executing the corresponding control command. This method reduces the impact of external interference on the alarm system and improves the accuracy and stability of the nozzle temperature alarm. Especially in large printers, it reduces the electromagnetic interference problem caused by long-distance nozzle cables and multiple peripheral power devices.

Claims

1. A nozzle temperature alarm circuit triggered by a CLK clock signal, characterized in that: Including nozzle, transistor switch, IC1555YMS clock oscillator, AND gate switch and CPU master control, The nozzle is used to accurately spray ink onto paper to form a printed pattern; The transistor switch acts as a trigger for the temperature alarm signal to control the on and off of the alarm circuit; The IC1555YMS clock oscillator is used to generate a stable clock signal to synchronize and control the timing of the entire inkjet system; The AND gate switch is used for logically judging the temperature alarm signal and the clock signal; The CPU master is used to receive signals from the AND gate switch and execute control commands.

2. The nozzle temperature alarm circuit triggered by a CLK clock signal according to claim 1, characterized in that: The nozzle includes an XHOT nozzle temperature alarm signal, which is respectively connected to one end of the first resistor R4 and the second resistor R5. The other end of the first resistor R4 is respectively connected to the power supply 3.3V and one end of the first capacitor C15. The other end of the second resistor R5 is connected to the transistor switch.

3. The nozzle temperature alarm circuit triggered by a CLK clock signal according to claim 1, characterized in that: The transistor switch includes a transistor Q1, the base of the transistor Q1 is connected to the XHOT nozzle temperature alarm signal through R5, the emitter of the transistor Q1 is connected to the power supply 3.3V and the second capacitor C1, the collector is connected to the power supply end of U2, the second capacitor C1 is also connected to the ground, and the collector of the second capacitor C1 is connected to the IC1555YMS clock oscillator.

4. The nozzle temperature alarm circuit triggered by a CLK clock signal according to claim 1, characterized in that: The IC1555YMS clock oscillator includes a chip U2, a first pin of the chip U2 being respectively connected to the collector of the transistor switch and one end of the third capacitor C3, one end of the third capacitor C3 being also connected to one end of the fourth capacitor C14, the other ends of the third capacitor C3 and the fourth capacitor being both connected to the ground, a second pin of the chip U2 being connected to the other end of the third capacitor C3, a third pin of the chip U2 being respectively connected to one end of the third resistor R2 and the fourth resistor R3, one end of the fourth resistor R3 being also connected to one end of the fifth capacitor C17, the other ends of the fourth resistor R3 and the fifth capacitor C17 being also connected to the ground, and one end of the fifth capacitor C17 being also connected to the AND gate switch.

5. The nozzle temperature alarm circuit triggered by a CLK clock signal according to claim 4, characterized in that: The fourth pin of the chip U2 is connected to the other end of the third resistor R2 and one end of the sixth capacitor C12 respectively, the other end of the sixth capacitor C12 is connected to the ground, and the fifth pin of the chip U2 is connected to the fourth pin of the chip U2.

6. The nozzle temperature alarm circuit triggered by a CLK clock signal according to claim 1, characterized in that: The AND gate switch includes a chip U4, a first pin of the chip U4 is connected to the fifth pin of the chip U4 through a fifth resistor R6, the fifth pin of the chip U4 is also connected to one end of the first capacitor C15, the other end of the first capacitor C15 is connected to the ground, the second pin of the chip U4 is connected to the IC1555YMS clock oscillator, the third pin of the chip U4 is connected to the ground, and the fourth pin of the chip U4 is connected to the AD detection input end.

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